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# CMMetadataFormatDescriptionCreateFromBigEndianMetadataDescriptionBlockBuffer(allocator:bigEndianMetadataDescriptionBlockBuffer:flavor:formatDescriptionOut:)

Creates a metadata format description from a big-endian metadata description structure inside a buffer.

```
func CMMetadataFormatDescriptionCreateFromBigEndianMetadataDescriptionBlockBuffer(allocator: CFAllocator?, bigEndianMetadataDescriptionBlockBuffer metadataDescriptionBlockBuffer: CMBlockBuffer, flavor: CMMetadataDescriptionFlavor?, formatDescriptionOut: UnsafeMutablePointer<CMMetadataFormatDescription?>) -> OSStatus
```

## Parameters

`allocator`

Allocator to use for allocating the `CMMetadataFormatDescription` object. May be `NULL`.

`metadataDescriptionBlockBuffer`

`CMBlockBuffer` containing MetadataDescription data structure in big-endian byte ordering.

`flavor`

Reserved for future use. Pass NULL for QuickTime Movie or ISO flavor.

`formatDescriptionOut`

Receives new CMMetadataFormatDescriptionRef.

## Discussion

---

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